Combustion pressure sensors that concentrate the technology of the Citizen Group
The combustion sensors concentrate the Citizen Group’s piezoelectric crystal, ceramic and metalworking technology along with the technology to mass produce compact precision components.
In addition to the conventional development applications, they can be installed in the internal combustion engines of mass production vehicles to improve compliance with environmental regulations and fuel economy.
TECHNOLOGY
Sensors Employing Langasite-type
Crystals
Integrated Production from
Element Development to Assembly
In-house development of “langasite-type crystal” piezoelectric elements
Langasite-type crystals, which are able to demonstrate their piezoelectric element performance even in high-temperature environments, are adopted. Drawing on our experience as a crystal manufacturer, we handle everything from growing crystals to processing them in-house.
Integrated production using equipment and technologies built up in the Citizen Group
We apply the technology for mass production of small precision parts, in which we can boast accuracy in micron units, built up in watch manufacture. Along with that we have established in-house manufacture/integrated production of key components including elements.
High pressure-resistant,
High-performance Sensors
Installable in
High performance Vehicles
Measurement of knocking also possible
High pressure-resistant and high-performance sensors are realized by adopting crystals with high heat resistance and applying watch manufacturing technology. They are of course used for measuring knocking, and also for applications including ignition timing control.
Installation in mass production vehicles achieved!!
Using our unique sensor structure ensures high durability. Their installation in mass production vehicles has been achieved by establishing mass production technology for them.Measuring the pressure inside constantly changing cylinders helps realize the optimum combustion conditions.
Installable in High performance Vehicles
Installable in High performance Vehicles
Due to their high durability and performance, these sensors can be used in development (test bench) situations such as for High power engine and supercharged engines, and for installation in actual vehicles. They maximize engine performance.
PRODUCTS
Automotive
Supercharging Vehicles
For automotive
| Type | CAS-30 |
| Measuring range(MPa) | 0～25 |
| Sensitivity (pC/MPa) | – |
| Linearity(%FSO) | ≦±1.0 |
| Natural frequency(KHz) | ＞140 |
| Insulation resistance(?) | ≧1013 |
| Operating range(℃) | ～350℃ |
| Cable connection(mm) | M8×1 |
| Cooling | Non-cooling |
| Cable | Low noise cable for exclusive use |
- ※Accuracy is different depending on the installation method.
※Please inquire the method of connecting the sensor and the connector.
For Supercharging engine、High power Engine
| Type | MCX02 | MCX03 |
| Use application | High output and supercharged engine etc. | |
| Measuring range(MPa) | 0∼80MPa(0~800bar) | 0∼40MPa(0~400bar) |
| Sensitivity (pC/MPa) | -13pC/bar | -15pC/bar |
| Linearity(%FSO)） | ≦±0.5%FSO | |
| Natural frequency(KHz) | >110KHz | >120KHz |
| Insulation resistance(?) | ≧10¹³ | |
| Operating range(℃) | -40∼400（℃） | |
| Thermal shock error | ≦±1.0bar | ≦±0.5bar |
| Mounting dimensions(mm) | Standard size：M5×0.5、HEX：4（mm） | |
| Cooling | Non-cooling | |
| Mounting torque | 1.5Nm | |
General・Development
Basic specifications sensors for general measurement
| Type | CAS-04 | CAS-05 | CAS-14 | CAS-15S | CAS-15K | CAS-16 | CAS-17 | CAS-19 | CAS-23 |
| Use Application | Measurement | Water-cooled engines | Ship / generator High durability Heat sink mounting |
Measurement | Measurement | Measurement use / Large-sized |
Measurement use The plug insertion is possible |
Super extra-fine / Combined with Adapters |
Very small screw type / Combined with Adapters |
| Measuring range（Mpa） | 0~25 | ||||||||
| Sensitivity（pc/bar） | -28 | -22 | -4.5 | -22 | -13.5 | -27 | -19 | -10 | -10 |
| Linearity（%FSO） | ≦±0.7 | ≦±0.5 | ≦±1.0 | ≦±0.5 | ≦±0.7 | ||||
| Natural Frequency（KHz） | >140 | ||||||||
| Insulation resistance（Ω） | ≧10¹³ | ||||||||
| Operating range（℃） | ~350 | ||||||||
| Cable connection（mm） | M7 | M5×0.5 | M3.5×0.35 | ||||||
| Cooling | Non-cooling | ||||||||
| Cable | Low noise cable for exclusive use | ||||||||